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;;; auto-load-project.el --- Auto load elisp file on project open
;; Copyright © 2019 Yann Esposito <>
;;; Commentary:
;;; Code:
(require 'projectile)
(defvar auto-load-project/trusted-gpg-key-fingerprints
"The list of GPG fingerprint you trust when decrypting a gpg file.
You can retrieve the fingerprints of your own private keys
with: `gpg --list-secret-keys' (take care of removing the
spaces when copy/pasting here)")
(defun auto-load-project/get-sign-key (file)
"Return the fingerprint of they key that signed FILE.
To sign a file you should used
`gpg --local-user my@email --output project.el.sig --detach-sign project.el`"
(format "gpg --status-fd 1 --verify %s.sig %s 2>/dev/null " file file)
"|grep VALIDSIG"
"|awk '{print $3}'"))))
(defun auto-load-project/trusted-gpg-origin-p (file)
"Return non-nil if the FILE is encrypted with a trusted key."
(member (auto-load-project/get-sign-key file)
(defconst auto-load-project/project-file "project.el"
"Project configuration file name.")
(defvar auto-load-project/loaded-projects (list)
"Projects that have been loaded by `auto-load-project/load'.")
(defun auto-load-project/load ()
"Loads the `auto-load-project/project-file' for a project.
This is run once the project is loaded signifying project setup."
(when (projectile-project-p)
(lexical-let* ((current-project-root (projectile-project-root))
(project-init-file (expand-file-name auto-load-project/project-file current-project-root))
(project-sign-file (concat project-init-file ".sig")))
(when (and (not (member current-project-root auto-load-project/loaded-projects))
(file-exists-p project-init-file)
(file-exists-p project-sign-file)
(auto-load-project/trusted-gpg-origin-p project-init-file))
(message "Loading project init file for %s" (projectile-project-name))
(condition-case ex
(progn (load project-init-file)
(add-to-list 'auto-load-project/loaded-projects current-project-root)
(message "%s loaded successfully" project-init-file))
"There was an error loading %s: %s"
(error-message-string ex))))))))
(add-hook 'find-file-hook #'auto-load-project/load t)
(add-hook 'dired-mode-hook #'auto-load-project/load t)
(provide 'auto-load-project)
;;; auto-load-project.el ends here